diff --git a/setup/ajax.dataloader.php b/setup/ajax.dataloader.php
index f80359fba..e39e6ff03 100644
--- a/setup/ajax.dataloader.php
+++ b/setup/ajax.dataloader.php
@@ -47,6 +47,7 @@ require_once(APPROOT.'/setup/setuppage.class.inc.php');
 require_once(APPROOT.'/setup/moduleinstaller.class.inc.php');
 
 ini_set('max_execution_time', max(3600, ini_get('max_execution_time'))); // Under Windows SQL/backup operations are part of the timeout and require extra time
+date_default_timezone_set('Europe/Paris'); // Just to avoid a warning if the timezone is not set in php.ini
 
 $sMemoryLimit = trim(ini_get('memory_limit'));
 if (empty($sMemoryLimit))
diff --git a/setup/index.php b/setup/index.php
index 4f33da42f..cc2cae1a5 100644
--- a/setup/index.php
+++ b/setup/index.php
@@ -36,6 +36,7 @@ ini_set('max_execution_time', max(240, ini_get('max_execution_time')));
 // While running the setup it is desirable to see any error that may happen
 ini_set('display_errors', true);
 ini_set('display_startup_errors', true);
+date_default_timezone_set('Europe/Paris'); // Just to avoid a warning if the timezone is not set in php.ini
 
 /////////////////////////////////////////////////////////////////////
 // Fake functions to protect the first run of the installer
diff --git a/setup/setuppage.class.inc.php b/setup/setuppage.class.inc.php
index 0fe74d64c..0c6448da3 100644
--- a/setup/setuppage.class.inc.php
+++ b/setup/setuppage.class.inc.php
@@ -30,7 +30,6 @@ require_once(APPROOT."setup/runtimeenv.class.inc.php");
 
 define('INSTALL_LOG_FILE', APPROOT.'/log/setup.log');
 
-date_default_timezone_set('Europe/Paris');
 class SetupPage extends NiceWebPage
 {
     public function __construct($sTitle)